Spec Clutch SZ603H Stage 2 Plus Performance Clutch Kit

The SPEC SZ603H Stage 2 Plus Clutch Kit bridges the gap between the SPEC Stage 2 and Stage 3 clutch kits, delivering the smooth daily drivability of the Stage 2 while offering a significantly higher torque capacity for modified and performance-built engines. It is an ideal upgrade for drivers who have outgrown the standard Stage 2 but are not ready to sacrifice street manners for an aggressive Stage 3 setup.

This kit features a multi-friction disc in a full-faced configuration, with carbon semi-metallic material on one side and Kevlar® on the other, providing excellent wear characteristics and consistent engagement across a wide range of driving conditions. The high-clamp pressure plate and high-torque sprung hub assembly deliver a 15–20% higher torque capacity over the Stage 2, making it well-suited for modified engines pushing beyond the Stage 2's limits.

Key Features:

• High-clamp pressure plate for increased clamping force
• Multi-friction disc — carbon semi-metallic on one side, Kevlar® on the other
• Full-faced disc configuration for smooth, consistent engagement
• Double-sprung hub with spring cover reliefs for flexibility and noise reduction
• Heat-treated components for long-term strength and durability
• 15–20% higher torque capacity than the standard Stage 2
• Bearing and installation tool kit included

Recommended Driving Applications: Street, Drag Racing, Road Racing, Rally, Pulling, Autocross, and Drifting